Discolored filters: Filter discoloration is natural and will vary depending on water. Replace filter about every two months (depending on use and local water quality), or when performance starts to deteriorate. If you see that the filter has a heavy build-up of impurities or notice the presence of persistent odors associated with poor water quality, change the filter more frequently.

Humidifier Wick Filter Tip:
Extend the life of your humidifier wick filter with the ProTec Humidifier Cleaning Cartridge. Simply drop in the water tank for a fresh, clean mist and continuous protection against slimy build-up in your humidifier. Works in all cool wick-based humidifiers to prevent the growth of bacteria and extend filter life.